The object data management group (ODMG) object model offers a standard for object-oriented database designers, while attempting to address some issues of interoperability. This research is focused on the viability of ...
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The object data management group (ODMG) object model offers a standard for object-oriented database designers, while attempting to address some issues of interoperability. This research is focused on the viability of using the ODMG data model as a canonical data model in a multidatabase environment, and where weaknesses are identified we have proposed amendments to enable the model to suit the specific needs of this type of distributed database system. This paper describes our efforts to extend its relational style algebra, and to provide query closure and a viewing mechanism for object query language to construct multidatabase schemas, (C) 1999 Elsevier Science B.V. All rights reserved.
This research paper discusses the core object model for architectural design, developed in the context of the IDEA+ project. This project aims at developing an Integrated Design Environment for Architect designers, in...
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This research paper discusses the core object model for architectural design, developed in the context of the IDEA+ project. This project aims at developing an Integrated Design Environment for Architect designers, in which design tools and computational tests are gathered around and make use of a core object model. The object-oriented analysis method MERODE is used to develop this model. Due to the method's model-driven development, conceptual modelling is subdivided in an enterprise-modelling phase and a functionality-modelling phase. This structured approach has proven to be a firm base to the development of the envisaged model and enhances the model's integration in the design environment. (C) 2001 Elsevier Science Ltd. All rights reserved.
Industrial robots have been recently introduced into the assembly line of consumer products. To assemble a product, goal coordinates must be specified for the robot. Because this task is quite difficult and time-consu...
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ISBN:
(纸本)9781424490660
Industrial robots have been recently introduced into the assembly line of consumer products. To assemble a product, goal coordinates must be specified for the robot. Because this task is quite difficult and time-consuming, we propose computing the values of goal coordinates from an object model of target design. In this paper, we define a model capable of managing information necessary for assembling parts by a robot. The effectiveness of the model is verified by using an experimental system.
object-oriented development of software systems and their components is based on the application of object-oriented models, technologies and tools that support them. Real systems are characterized by complexity, which...
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object-oriented development of software systems and their components is based on the application of object-oriented models, technologies and tools that support them. Real systems are characterized by complexity, which is caused by problems describing the properties and behavior of subject domain objects. A description of the subject domain is given in the natural language, which can be considered an input language at the stage of object-oriented analysis. Syntax-oriented processing of sentences in the input language forms the output of the model software system. The conversion of the input language into a certain output is reduced to the construction of some translator, which, for any transformations of the sentences of the input language, uses the structure of this sentence. The ideas on which this concept is based include the ideas of formal grammars and semantic calculations for symbolic chains. These dquestions are the basis of the work under consideration.
When a robot wants to manipulate an object, it needs to know what action to execute to obtain the desired result. In most of the cases, the actions that can be applied to an object consist of exerting forces to it. If...
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ISBN:
(纸本)9781424466757
When a robot wants to manipulate an object, it needs to know what action to execute to obtain the desired result. In most of the cases, the actions that can be applied to an object consist of exerting forces to it. If a robot is able to predict what will happen to an object when some force is applied to it, then it's possible to build a controller that solves the inverse problem of what force needs to be applied in order to get a desired result. To accomplish this, the first task is to build an object model and second to get the right parameters for it. The goals of this paper are 1) to demonstrate the use of an object model to predict outcomes of actions, and 2) to adapt this model to an specific object instance for a specific robot.
It is sometimes necessary to operate on data having different sets of attributes. It can be caused by the fact that the data come from different sources or that we collected different amount of information about diffe...
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ISBN:
(纸本)9781424445257
It is sometimes necessary to operate on data having different sets of attributes. It can be caused by the fact that the data come from different sources or that we collected different amount of information about different realworld entities. In such cases a unification of the data to be stored into tables causes either data loss or too frequent changes in the table/database layout. Therefore we propose a data model allowing effective handling of such data. The model, originally developed for storage and processing of non-graphic data in a temporal GIS, ensures that all procedures/functions/methods are performed only on objects having all data necessary for their successful completion. Such features enable easier creation of context-aware and context-adaptable applications.
Dynamic segmentation Is commonly viewed as one or the most effective aspects of GIS for transportation applications. To date, much of this effort has focused on relational data models, with object data models receivin...
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ISBN:
(纸本)0780373898
Dynamic segmentation Is commonly viewed as one or the most effective aspects of GIS for transportation applications. To date, much of this effort has focused on relational data models, with object data models receiving for less attention. This paper presents a novel object model that provides a natural representation of dynamically segmented features by extending the object Database Management Group (ODMG) standard with a mechanism called parametric polymorphism. This mechanism supports the shifting of a conventional data type into a linear type to maintain knowledge about events (e.g. pavement condition, traffic volumes and traffic accidents) that change spatially along linear features. An associated object query language that Is not available in current GIS packages is also provided for data analyses relevant to dynamic segmentation.
Remote sensing images often contain large ground range. A large number of targets, irregular distribution rules and large scale transformation are included in an image, so the target detection is difficult and it take...
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ISBN:
(纸本)9781450366250
Remote sensing images often contain large ground range. A large number of targets, irregular distribution rules and large scale transformation are included in an image, so the target detection is difficult and it takes a lot of time to calculate. The traditional target detection can locate the target in the image by multi-scale sliding window, but the selection speed, quantity and quality of the candidate frame not only affect the time efficiency of the target detection, but also affect the accuracy of the target detection. The sliding window method thinks that the possibility of each position in the image is the same. Therefore, it traverses every position in the image into a candidate frame window, and exhaustion of the search images with violent exhaustion, resulting in a large number of redundant and low quality redundant windows. WEI [1] proposes a target intention recognition model based on radial basis function neural network;YU [2] proposes a joint supervised recognition method based on dense convolution neural network, which combines local and global features, and obtains image features based on dense convolution neural network. ZHANG [3] proposed a fine target recognition method for color image under complex background, and used Bayesian model to distinguish skin color and background color in color image;ZHANG [4] aiming at the problems of tedious process and difficult feature extraction in traditional image recognition algorithm, an image adaptive target recognition algorithm based on depth feature learning is proposed;WANG [5] simply processes the original data and inputs it directly as input data into the convolution neural network. The convolution neural network is used to analyze the local features. The calculation process is very time-consuming and violates the human visual mechanism. In order to solve the limitation of the selection speed, quantity and quality of the target candidate frame in the traditional sliding window detection technology, the
Global informationmanagementsystems based on the vision of the docuverse -such as the World-Wide Web (WWW)-show that on-line access to vast amountsof distributed information is possible not only forthe expert, but als...
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Global informationmanagementsystems based on the vision of the docuverse -such as the World-Wide Web (WWW)-show that on-line access to vast amountsof distributed information is possible not only forthe expert, but also forthe end user. At the same time, the availability of affordablemid- and long-rangewirelessdata communicationservices, based, e.g.3on cellular phone technology, has put the vision of ubiquitous mobile information access within the reach of viable projects. It is now an interesting challengeto combine both concepts into a system model granting everyone ubiquitous access to the global information repository. However, problemssuch as low bandwidth and limited resources make this a non-trivial task. This paper describes MISIO, an experimental mobile informationsystem based on wireless data communication which has been developed at the Computer Graphics Center during 1994. MISO and its underlying concepts address the above mentioned problem areas by introducing a fragmented objectmodel. This model provides the necessary mechanisms for a (partial)migration of object behaviour to the mobile system-cting as an intelligent data terminakt runtime. In addition to conventional caching and compression techniques, this is required for coping with intrinsic system limitations and low communicationbandwidth in an environmentwith a virtually unlimited number of information types and sewices such as the docuverse.
High Level Architecture (HLA) is a new architecture for distributed simulation. Its purpose is to facilitate interoperability among the simulation applications and to promote reuse of simulations and their components....
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ISBN:
(纸本)0819453676
High Level Architecture (HLA) is a new architecture for distributed simulation. Its purpose is to facilitate interoperability among the simulation applications and to promote reuse of simulations and their components. object model is important to implement purpose of HLA. OM provides a standard template to describe the abilities of simulations joining federate and the demands of outer systems. This paper introduces the basic content of HLA and describes the components of OM. Based on the authors' comprehend and practice, the paper analyzes the object-oriented characteristic of OM and the ability to support interoperability and reuse of OM. With the primary practice of navy salvage drilling simulation system, the authors give the designing of OM with an example according to the designing principle of OM.
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